Dangerous journeys in history

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Across
  1. 4. not enough (of something)
  2. 6. strict
  3. 8. a group of countries ruled by a single person
  4. 10. tired
  5. 13. far away (place)
  6. 15. not knowing how to read and write
Down
  1. 1. long walk
  2. 2. fight
  3. 3. come closer
  4. 5. to kill oneself
  5. 7. to get free
  6. 9. to start a journey
  7. 11. to suggest that something unpleasant will happen unless a particular action is followed
  8. 12. eat up
  9. 14. bog